This is a note to let you know that I've just added the patch titled
KVM: x86/mmu: Expand collapsible SPTE zap for TDP MMU to ZONE_DEVICE and HugeTLB pages
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-x86-mmu-expand-collapsible-spte-zap-for-tdp-mmu-.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bfa0f7ac9399c6b0ca3df79b2412c74ed04532da
Author: Sean Christopherson <seanjc@xxxxxxxxxx>
Date: Fri Feb 12 16:50:02 2021 -0800
KVM: x86/mmu: Expand collapsible SPTE zap for TDP MMU to ZONE_DEVICE and HugeTLB pages
[ Upstream commit c060c72ffeb448fbb5864faa1f672ebfe14dd25f ]
Zap SPTEs that are backed by ZONE_DEVICE pages when zappings SPTEs to
rebuild them as huge pages in the TDP MMU. ZONE_DEVICE huge pages are
managed differently than "regular" pages and are not compound pages.
Likewise, PageTransCompoundMap() will not detect HugeTLB, so switch
to PageCompound().
This matches the similar check in kvm_mmu_zap_collapsible_spte.
Cc: Ben Gardon <bgardon@xxxxxxxxxx>
Fixes: 14881998566d ("kvm: x86/mmu: Support disabling dirty logging for the tdp MMU")
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Message-Id: <20210213005015.1651772-2-seanjc@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index b56d604809b8a..17976998bffbc 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -1067,7 +1067,8 @@ static void zap_collapsible_spte_range(struct kvm *kvm,
pfn = spte_to_pfn(iter.old_spte);
if (kvm_is_reserved_pfn(pfn) ||
- !PageTransCompoundMap(pfn_to_page(pfn)))
+ (!PageCompound(pfn_to_page(pfn)) &&
+ !kvm_is_zone_device_pfn(pfn)))
continue;
tdp_mmu_set_spte(kvm, &iter, 0);
